The attachment to one's cell phone seems sometimes pathological.
In the latest incident involving cell phones and trains, a man got on a train in Florida and, once the train had moved off, remembered he'd left his cell phone on a bench on the station platform.
According to WPBF-TV, he decided to break the glass and pull the emergency cord to stop the train.
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Next, the train doors opened (some reports say he pried them open) and he either tried to leap out or possibly slipped (or both), while the train was still moving.
According to WPEC-TV, the train may have been moving at 18 mph.
Twenty-six-year-old Eddie Diaz was then struck by a train coming in the other direction.
Tri-Rail spokeswoman Bonnie Arnold told WPEC-TV that the cord "does not stop the train immediately, but it does stop the power to the train, which will eventually stop the train."
The incident happened at West Palm Beach Tri-Rail station. Diaz is currently said to be in critical condition with a head injury.
Previously this year, a man in the Bronx jumped from a platform onto the tracks to retrieve his phone and was struck by a train and killed.
Reports and even footage from many parts of the world -- Brazil, for example -- show that when people lose their cell phones, rationality sometimes departs too.
As Arnold told WPEC-TV: "It's just not worth risking your life for something so frivolous."